table {
  border-collapse: collapse;
  margin-top: 20px;
  border: 0;
}

table caption {
  font-size: 120%;
}

td {
  border-bottom: 1px solid gray;
  padding-top: 6px;
  padding-bottom: 6px;
}

td.clean {
  border-bottom: 0px;
}

td.valid {
  background-color: green;
}

td.empty, td.not-chosen, td.double {
  background-color: orange;
}

td.no-runner {
  background-color: red;
}




